AMERICAN drone attacks on the border between Afghanistan and Pakistan are causing a massive humanitarian emergency, Pakistani officials claimed after a new attack yesterday killed 13 people.

The dead and injured included foreign militants, but women and children were also killed when two missiles hit a house in the village of Data Khel, near the Afghan border, according to local officials.

As many as 1m people have fled their homes in the Tribal Areas to escape attacks by the unmanned spy planes as well as bombings by the Pakistani army. In Bajaur agency entire villages have been flattened by Pakistani troops under growing American pressure to act against Al-Qaeda militants, who have made the area their base.

Kacha Garhi is one of 11 tented camps across Pakistanâ€™s frontier province once used by Afghan refugees and now inhabited by hundreds of thousands of Pakistanis made homeless in their own land.

So far 546,000 have registered as internally displaced people (IDPs) according to figures provided by Rabia Ali, spokesman for the United Nations High Commissioner for Refugees, and Maqbool Shah Roghani, administrator for IDPs at the Commission for Afghan Refugees.